#include <WiFi.h>
#include "DHTesp.h"
#include "ThingSpeak.h"
#include <LiquidCrystal_I2C.h>

// Define sensor and output pins
const int DHT_PIN = 15;
const int buzzer = 2;
const int LED1 = 25; // LED for high temperature
const int LED2 = 26; // LED for moderate temperature
const int LED3 = 27; // LED for low temperature

// Wi-Fi configuration
const char* WIFI_NAME = "Wokwi-GUEST";
const char* WIFI_PASSWORD = "";

// ThingSpeak settings
const int myChannelNumber = 2308820;
const char* myApiKey = "2TPP3XJSEVKRQ2PK";
const char* server = "api.thingspeak.com";

// Object initialization
DHTesp dhtSensor;
WiFiClient client;
LiquidCrystal_I2C lcd(0x27, 20, 4); // LCD I2C address setup

void setup() {
  // Initialize LCD
  lcd.init();
  lcd.backlight();

  // Start serial communication
  Serial.begin(115200);

  // Setup DHT sensor
  dhtSensor.setup(DHT_PIN, DHTesp::DHT22);

  // Configure pin modes
  pinMode(LED1, OUTPUT);
  pinMode(LED2, OUTPUT);
  pinMode(LED3, OUTPUT);
  pinMode(buzzer, OUTPUT);

  // Connect to Wi-Fi
  WiFi.begin(WIFI_NAME, WIFI_PASSWORD);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to Wi-Fi...");
  }
  Serial.println("Wi-Fi Connected!");
  Serial.println("Device IP Address: " + String(WiFi.localIP()));

  // Initialize ThingSpeak
  WiFi.mode(WIFI_STA);
  ThingSpeak.begin(client);
}

void loop() {
  // Read temperature and humidity from DHT22
  TempAndHumidity data = dhtSensor.getTempAndHumidity();

  // Send data to ThingSpeak
  ThingSpeak.setField(1, data.temperature);
  ThingSpeak.setField(2, data.humidity);

  // Control LEDs and buzzer based on temperature levels
  if (data.temperature > 35) {
    digitalWrite(LED1, HIGH); // High temperature alert
    tone(buzzer, 1000);       // Sound alarm
  } else {
    digitalWrite(LED1, LOW);
    noTone(buzzer);
  }

  if (data.temperature > 20 && data.temperature <= 35) {
    digitalWrite(LED2, HIGH); // Moderate temperature
  } else {
    digitalWrite(LED2, LOW);
  }

  if (data.temperature <= 20) {
    digitalWrite(LED3, HIGH); // Low temperature
  } else {
    digitalWrite(LED3, LOW);
  }

  // Print readings to serial monitor
  Serial.println("Temperature: " + String(data.temperature, 2) + " °C");
  Serial.println("Humidity: " + String(data.humidity, 1) + " %");

  // Display readings on LCD
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Temp: ");
  lcd.print(data.temperature, 1);
  lcd.print(" C");

  lcd.setCursor(0, 1);
  lcd.print("Humidity: ");
  lcd.print(data.humidity, 1);
  lcd.print(" %");

  // Confirm data upload status
  int x = ThingSpeak.writeFields(myChannelNumber, myApiKey);
  if (x == 200) {
    Serial.println("Data uploaded to ThingSpeak");
  } else {
    Serial.println("Upload failed, error code: " + String(x));
  }

  Serial.println("---------------------------");
  delay(10000); // Delay 10 seconds between uploads
}